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(No Model.)

J. H. WRIGHT.

FRICTION GLUTGH.

No. 288,291. Patentd'Nov. 13, 1883.

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JOHN H. W'R-IGHT, OE BRIDGEPORT, CONNECTICUT.

FRICTION-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 288,291, dated'November 13, 1863.

Application filed m 9, 1883. (No model.)

f0 aZZ whom it may concern.-

Be it known that I, JOHN H. WVRIGHT, of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Friction- Clutches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the-same.

My invention relates to friction-clutches, the object being to avoid complication and expense in construction, and provide a clutch which shall be simple and durable in construction and adapted to be manufactured at small expense.

The invention consists in the combinations of parts hereinafter fully described, and pointed out in the claims.

In the drawings, Figure 1 represents a side elevation of a shaft'pulley and my improved friction-clutch devices. Fig. 2 is asimilar view taken from the opposite side of the pulley. Fig. 3 is a vertical section on the line as m of Fig. 1, and Fig. at represents the split ring of the clutch detached.

A represents a shaft formed with a shoulder, a.

B represents a pulley mounted upon said shaft, and adapted to rest against the collar a, and provided at its opposite side with a hub, 12, over which is secured a cap or clampingthimble, G, the latter being bored out to fit upon the shaft A, and provided with perforations c 0, adapted to receive a pin, D, which passes through the shaft and secures the cap in place. The pulley Bis annularly recessed to receive a split ring, D, which latter is provided with a perforated lug, d, adapted to receive a screw, (1, which passes through the pulley B to secure the ring in place. This ring D is formed with arms E E, extending at a right angle to the ring and parallel with each other. These arms E E, project through an elongated slot e, formed adjacent to the periphery of the pulley, and the outer side of each arm is formed with a notch or recess, 6, adapted to receive the upper end of a pivoted lever or jaw, F. These levers or jaws F F are'pivotally secured (one on each side of the shaft A)'to the side of the pulley B opposite "to that upon which the split ring rests. The

pivots or screws ff pass through the upper ends of the jaws. The lower ends of the latter are free to move outward; but their inward movement is limited by stop-pins g g, secured to the pulley.

H represents a loose sleeve mounted upon the shaft A, and formed wit-h a laterally-projecting collar or hub, 71. This collar or hub is adapted to be forced between the jaws F F, thus forcing outward the lower ends of the latter, and securely holding the collar h by the spring action of the split ring,whose proj ecting arms, as above stated, engage the upper ends of the pivoted jaws. The pulley B is held securely upon the shaft, to revolve therewith, by the clamping cap or thimblc O, and the shipping or sliding of the loose sleeve H effects thefrictional connect-ion or disconnection of the two pulleys.

My improvement, as thus described, is susceptible of slight alterations and modifications in form and construction; hence I do not limit myself to the precise construction herein sh own a and described, but reserve to myself the right to make all such changes as may properly fall withinthe scope of 'my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a friction-clutch, the combination, with theshaft, the cap having a pin which secures it thereto, and the pulley secured to the cap, and thereby rigidly to the shaft, said pulley being formed with an elongated slot, of the split ring secured to one side of said pulley, and having notched arms projecting through said slot, the levers pivoted to the pulley, having their short arms fitted in notches formed in the split-ring arms and their longer arms crossing the center of the pulley, and the loosely-mounted sleeve having its periphery tapering at one end and adapted to be forced between said levers or jaws, substantially as set forth.

2. Ina friction-clutch, the con1bination,with a shaft having an annular shoulder formed thereon, and a slotted pulley adapted to bear against said shoulder, of a clamping cap or thimble adapted to be rigidly secured to the to the pulley, so that their uppen ends will engage said arms to contract the split ring, st0ppins for limiting the movement of said jaws,

and a loosely-mounted sleeve having an an-- 5 nular portion adapted to enter and be held between said levers or jaws substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subsorib ing witnesses.

JOHN H. WVRIGHT.

WVitnesses:

J OHN W. AYnRs, JOHN MARSHALL. 

